This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A029806 #16 Feb 12 2025 11:22:11
%S A029806 0,1,4,9,36,81,121,729,4225,5329,6241,6561,6889,38025,47961,56169,
%T A029806 133956,263169,294849,342225,485809,1196836,2368521,3080025,3515625,
%U A029806 8468100,16785409,17313921,17850625,20043529,21316689,21911761
%N A029806 n in base 8 is a palindromic square.
%H A029806 Vincenzo Librandi, <a href="/A029806/b029806.txt">Table of n, a(n) for n = 1..100</a>
%H A029806 Patrick De Geest, <a href="https://www.worldofnumbers.com/nobase10pg2.htm">Palindromic Squares in bases 2 to 17</a>
%t A029806 pb8Q[n_]:=Module[{idn8=IntegerDigits[n, 8]}, idn8==Reverse[idn8]]; Select[Range[0, 20000]^2, pb8Q] (* _Vincenzo Librandi_, Jul 24 2014 *)
%Y A029806 Cf. A002779, A029734, A029738, A029983, A029985, A029987, A029989, A029991, A029993, A029995, A029997, A029999, A030074, A030075.
%K A029806 nonn,base
%O A029806 1,3
%A A029806 _Patrick De Geest_